Energy Sword Smoke Effect
You could try giving it a material like this:

The first thing I did was warp the object vector using a Noise Texture to help give the rest a bit more of a &quot;swirly/smoky&quot; look. Next, I used this as the input vector for another Noise Texture (to make it extra distorted) and ran the result through a colored ColorRamp.

For the &quot;energy bolts&quot;, I used the same warped vector as the input for a Voronoi Texture set to Distance To Edge. I inverted the result and clamped it with a ColorRamp to make the &quot;Lightning&quot; stand out I then mixed this with the colors using a MixRGB node set to lighten to have good control over how much lightning is added (too bright looks fake):

If you want to soften the effect overall (looks even less fake), you can mix the final result with fitting, solid color. Finally, I suggest running the result through an Emission Shader with the strength turned up a bit. Don't forget to enable Bloom to make it glow: